I imagine Harry Greb looking very unorthodox is his style.
Punches coming from ridiculous angles at ridiculous speed, with a load of fouls flying in perpetual motion.
Michael Spinks, Roy Jones Jr, and Rocky Marciano all rolled into one - with less power than those big hitters but considerably more volume.
I imagine him doing something like what Calzaghe did to Lacy against most his opponents, but with more fouls and more speed.
Defensively I see him as slick as Duran, or slicker than any aggressive fighter than ever lived.

Probably not. I think in those days film was on a nitrate base and it was unstable over the years. One can hope, but I think not.

The rumor, of course, is that some footage *has* survived and is being hoarded by a handful of collectors. There is at least one vendor online who claims to have footage of Dempsey and Greb sparring, but when you inquire you get hemming and hawing. Until I see at least a single frame captured from the footage I'm more inclined to believe that it has been lost to time and neglect, like the known-to-be-filmed footage from Greb vs Walker (last viewed in the 1950s), and any claims to the contrary are based on misidentification.

By most accounts, he was a tricky pressure fighter who was difficult to catch with a clean punch, and who relied on volume punching (and a lot of dirty tactics) to overwhelm an opponent. Something tells me that a fighter like that wouldn't have been easy for any middleweight to fight.

By most accounts, he was a tricky pressure fighter who was difficult to catch with a clean punch, and who relied on volume punching (and a lot of dirty tactics) to overwhelm an opponent. Something tells me that a fighter like that wouldn't have been easy for any middleweight to fight.